Explain the difference between StatelessWidget and StatefulWidget.

StatelessWidget vs StatefulWidget:\n\n**StatelessWidget:**\n• Immutable widget\n• Cannot change state\n• Rebuilt when parent changes\n• Used for static content\n\n**StatefulWidget:**\n• Mutable widget\n• Can change state using setState()\n• Has lifecycle methods\n• Used for dynamic content\n• Maintains state across rebuilds